Each tab has a set of User Setting buttons you can use to store initial mask parameters that can be reused during the rotoscoping process. By default, the first time you create a mask without changing any initial settings, the mask will have the following default settings.

Any subsequent mask you create will inherit the same settings except for the mask color (which by default is on Auto and picks a random color), and the mask name instance (the next mask would be named GMask(2)).

If you change the parameters for a second mask, for example, its name, color and toggle off the Auto Color, all masks you create afterward will retain those parameters.

If you need to create masks with a particular set of parameters that you will need from time to time during your rotoscoping process, use the User Settings buttons.